Feel Free to Squeak

I don't know much about the open source programming language Squeak, but it does sound rather cool:

Squeak is a highly portable, open-source Smalltalk with powerful multimedia facilities. Squeak is the vehicle for a wide range of projects from educational platforms to commercial web application development.

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Squeak stands alone as a practical environment in which a developer, researcher, professor, or motivated student can examine source code for every part of the system, including graphics primitives and the virtual machine itself. One can make changes immediately and without needing to see or deal with any language other than Smalltalk.

Our diverse and very active community includes teachers, students, business application developers, researchers, music performers, interactive media artists, web developers and many others. Those individuals use Squeak for a wide variety of computing tasks, ranging from child education to innovative research in computer science, or the creation of advanced dynamic web sites using the highly acclaimed continuation based Seaside framework.

Squeak runs bit-identical images across its entire portability base, greatly facilitating collaboration in diverse environments. Any image file will run on any interpreter even if it was saved on completely different hardware, with a completely different OS (or no OS at all!).

Now, though, it seems there is no excuse not to find out more:

To help more people get familiar with Squeak's very powerful programming environment, the new book Squeak by Example is now being made available under the Creative Commons Attribution-ShareAlike 3.0 license. It's intended for both students and developers and guides readers through the Squeak language and development environment by means of a series of examples and exercises. This is very useful to those who wish to become more familiar with the Croquet programming environment. You can either download the PDF for free, or you can buy a softcover copy from lulu.com.

What a classic combination: CC digital download, or an analogue version from Lulu.com.

Update 1: Alas, it seems you can't squeak freely - see comment below.

Update 2: Or maybe you can - see other comments below.